On PAPR reduction in pilot-assisted optical OFDM communication systems

Funmilayo B. Ogunkoya, Sinan Sinanovic, Wasiu O. Popoola

    Research output: Contribution to journalArticle

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    Abstract

    This paper presents a novel theoretical characterization of the pilot-assisted (PA) technique proposed for peakto- average-power-ratio (PAPR) reduction in optical orthogonal frequency division multiplexing (O-OFDM). The two systems considered are direct-current biased O-OFDM (DCO-OFDM) and asymmetrically clipped O-OFDM (ACO-OFDM) in optical wireless communications. The DCO-OFDM and ACO-OFDM time domain signals approach Gaussian and half-Gaussian distributions respectively. The PA technique uses P iterations of a pilot sequence to rotate the phase of U data symbols within a PA OOFDM frame and select the frame with the least PAPR. Thus, we utilize order statistics to characterize the PAPR distributions of the PA DCO-OFDM and ACO-OFDM system. The PA technique results in higher reduction in PAPR for high P but at the expense of increased complexity. In the theoretical framework developed, we are able to determine P that gives reasonable PAPR reduction gain. The theoretical analysis of PAPR reduction effects on the average optical and electrical signal power is studied. Results show that the PA technique is capable of reducing the optical energy per bit to noise power spectral density Eb(opt)/N0 ratio required to meet target bit-error-rate (BER) in an additive white Gaussian noise (AWGN) channel. Comparisons of the analytical results of PA O-OFDM signal with that of computer simulations show very good agreement.
    Original languageEnglish
    Pages (from-to)8916- 8929
    Number of pages14
    JournalIEEE Access
    Volume5
    DOIs
    Publication statusPublished - 9 May 2017

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    Orthogonal frequency division multiplexing
    Communication systems
    Power spectral density
    Gaussian distribution
    Bit error rate
    Statistics
    Communication
    Computer simulation

    Keywords

    • PAPR reduction
    • optical OFDM
    • communication systems

    Cite this

    Ogunkoya, Funmilayo B. ; Sinanovic, Sinan ; Popoola, Wasiu O. / On PAPR reduction in pilot-assisted optical OFDM communication systems. In: IEEE Access. 2017 ; Vol. 5. pp. 8916- 8929.
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    abstract = "This paper presents a novel theoretical characterization of the pilot-assisted (PA) technique proposed for peakto- average-power-ratio (PAPR) reduction in optical orthogonal frequency division multiplexing (O-OFDM). The two systems considered are direct-current biased O-OFDM (DCO-OFDM) and asymmetrically clipped O-OFDM (ACO-OFDM) in optical wireless communications. The DCO-OFDM and ACO-OFDM time domain signals approach Gaussian and half-Gaussian distributions respectively. The PA technique uses P iterations of a pilot sequence to rotate the phase of U data symbols within a PA OOFDM frame and select the frame with the least PAPR. Thus, we utilize order statistics to characterize the PAPR distributions of the PA DCO-OFDM and ACO-OFDM system. The PA technique results in higher reduction in PAPR for high P but at the expense of increased complexity. In the theoretical framework developed, we are able to determine P that gives reasonable PAPR reduction gain. The theoretical analysis of PAPR reduction effects on the average optical and electrical signal power is studied. Results show that the PA technique is capable of reducing the optical energy per bit to noise power spectral density Eb(opt)/N0 ratio required to meet target bit-error-rate (BER) in an additive white Gaussian noise (AWGN) channel. Comparisons of the analytical results of PA O-OFDM signal with that of computer simulations show very good agreement.",
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    On PAPR reduction in pilot-assisted optical OFDM communication systems. / Ogunkoya, Funmilayo B.; Sinanovic, Sinan; Popoola, Wasiu O.

    In: IEEE Access, Vol. 5, 09.05.2017, p. 8916- 8929.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - On PAPR reduction in pilot-assisted optical OFDM communication systems

    AU - Ogunkoya, Funmilayo B.

    AU - Sinanovic, Sinan

    AU - Popoola, Wasiu O.

    N1 - Manuscript accepted in open access journal, we await publishing to complete DOI details. Acceptance letter available if required [author note] Library note - Acceptance email in SAN AAM: replaced with VoR once published as OA, however no CC-BY licence applied (see http://ieeeaccess.ieee.org/frequently-asked-questions/ for the 2 CTA options)

    PY - 2017/5/9

    Y1 - 2017/5/9

    N2 - This paper presents a novel theoretical characterization of the pilot-assisted (PA) technique proposed for peakto- average-power-ratio (PAPR) reduction in optical orthogonal frequency division multiplexing (O-OFDM). The two systems considered are direct-current biased O-OFDM (DCO-OFDM) and asymmetrically clipped O-OFDM (ACO-OFDM) in optical wireless communications. The DCO-OFDM and ACO-OFDM time domain signals approach Gaussian and half-Gaussian distributions respectively. The PA technique uses P iterations of a pilot sequence to rotate the phase of U data symbols within a PA OOFDM frame and select the frame with the least PAPR. Thus, we utilize order statistics to characterize the PAPR distributions of the PA DCO-OFDM and ACO-OFDM system. The PA technique results in higher reduction in PAPR for high P but at the expense of increased complexity. In the theoretical framework developed, we are able to determine P that gives reasonable PAPR reduction gain. The theoretical analysis of PAPR reduction effects on the average optical and electrical signal power is studied. Results show that the PA technique is capable of reducing the optical energy per bit to noise power spectral density Eb(opt)/N0 ratio required to meet target bit-error-rate (BER) in an additive white Gaussian noise (AWGN) channel. Comparisons of the analytical results of PA O-OFDM signal with that of computer simulations show very good agreement.

    AB - This paper presents a novel theoretical characterization of the pilot-assisted (PA) technique proposed for peakto- average-power-ratio (PAPR) reduction in optical orthogonal frequency division multiplexing (O-OFDM). The two systems considered are direct-current biased O-OFDM (DCO-OFDM) and asymmetrically clipped O-OFDM (ACO-OFDM) in optical wireless communications. The DCO-OFDM and ACO-OFDM time domain signals approach Gaussian and half-Gaussian distributions respectively. The PA technique uses P iterations of a pilot sequence to rotate the phase of U data symbols within a PA OOFDM frame and select the frame with the least PAPR. Thus, we utilize order statistics to characterize the PAPR distributions of the PA DCO-OFDM and ACO-OFDM system. The PA technique results in higher reduction in PAPR for high P but at the expense of increased complexity. In the theoretical framework developed, we are able to determine P that gives reasonable PAPR reduction gain. The theoretical analysis of PAPR reduction effects on the average optical and electrical signal power is studied. Results show that the PA technique is capable of reducing the optical energy per bit to noise power spectral density Eb(opt)/N0 ratio required to meet target bit-error-rate (BER) in an additive white Gaussian noise (AWGN) channel. Comparisons of the analytical results of PA O-OFDM signal with that of computer simulations show very good agreement.

    KW - PAPR reduction

    KW - optical OFDM

    KW - communication systems

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    SP - 8916

    EP - 8929

    JO - IEEE Access

    JF - IEEE Access

    SN - 2169-3536

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